Kinetic analysis of the decomposition of chelates of di-alkyldithiocarbamate of Cd(II)

The thermal decomposition kinetics of the solid complexes Cd(S2CNR2)(2), wh ere R=C2H5, n-C3H7, n-C4H9 or iso-C4H9, was studied by using isothermal and non-isothermal thermogravimetry. The superimposed TG/DTG/DSC curves reveal ed that thermal decomposition reactions occur in the liquid phase. The kine tic model that best fitted the experimental isothermal TG data was the one- dimensional phase-boundary reaction-controlled process R-1. The thermal ana lysis data suggested the thermal stability sequence Cd(S2CNBu2n)(2)> Cd(S2C NPr2n)(2)> Cd(S2CNBu2i)(2)>Cd(S2CNEt2)(2), which accords with the sequence of stability of the apparent activation energies.